Are there issues witht the Carusoe model?

I previously had a thread on this but it must have been eaten by the bulletin board.

Basically I am looking for feedback on the Toto Carusoe model. I have read the MaP report testing. Considering a Drake is going to cost me almost 3 times as much (It just is, Drakes are super expensive around here) is it worth it spending the extra money? How much better is the Carusoe than say the Kohler Wellworth?